Add an Epic Panel to Kanban Board (not Backlog board)

Recently I raised a topic with this question

Is it possible to activate Epic panel on Kanban Board (not Backlog board)?

But the answer was negative.

So, please add a possibility to activate Epic panel on Kanban board.

Problem Definition

We use Kanban board for support tasks for our different products (web sites). We can't filter all on-going tasks on the Kanban board by separate product.
In our case One product (web site) = One epic. Epics are hidden from Kanban board, because of using of Backlog Board.

Suggested Solution

To add an Epic panel to Kanban board as it is presented in Backlog board

Why this is important

It will be very convenient to use JIRA, if you use one project for a lot of products.